Drive means for sewing machines



Aug. 28, 1962 E. w. BIALY DRIVE MEANS FOR SEWING MACHINES 2 Sheets-Sheet 1 Filed Jan. 25, 1960 INVENTOR. EDWARD W. BIALY y ATTORNEY WITNESS Aug. 28, 1962 E. w. BIALY 3,051,109

DRIVE MEANS F OR SEWING MACHINES Filed Jan. 25, 1960 2 Sheets-Sheet 2 IN VEN TOR.

EDWARD W. BIALY BY WITNESS A ATTORNEY United States Patent Office 3,5l,ld9 Patented Aug. 28, 1962 3,051,109 DRIVE MEANS FOR SEWING MACEHNES Edward W. Bialy, Hillside, N.J., assignor to The Singer Manufacturing Company, Elizabeth, N.J., a corpora tion of New Jersey Filed Jan. 25, 1961}, Ser. No. 4,353 4 Claims. (1. 112-220) The present invention relates to a drive means for sewing machines and particularly to a means for mounting a sewing machine motor.

The object of this invention is to provide a means for mounting a sewing machine motor, which means is simple and economical as Well as efiective and durable. A specific object of this invention is to provide such a motor mounting means that adjustably supports the motor, thereby rendering it particularly applicable to a sewing machine that is belt-driven from a motor wherein the adjustability of the motor is useful for effecting tightening of the driving belt.

. Having in mind the above and other objects that will be evident from an understanding of this disclosure, the invention comprises the devices, combinations and arrangements of parts as illustrated in the presently preferred embodiment of the invention which is hereinafter set forth in such detail as to enable those skilled in the art readily to understand the function, operation, construction and advantages, of it when read in conjunction with the accompanying drawings in which:

FIG. 1 is a vertical sectional view longitudinally of a sewing machine embodying the present invention.

FIG. 2 is an end elevational view of the sewing machine of FIG. 1 and partly broken away and in section to illustrate the present invention more clearly.

The present invention is herein disclosed as embodied in the sewing machine forming the subject matter of the United States Patent application of Johnson et al., Serial No. 4,430, filed January 25, 1960, to which reference may be had for a more complete understanding of the machine.

With reference to the drawings, the illustrated sewing machine has a frame comprising a bed 1 from the one end of which rises a vertically-arranged hollow standard 2 carrying a bracket arm 3 overhanging the bed 1 and terminating in a head 4. Journaled longitudinally of the bracket arm 3 is a main shaft 5 which drives the various mechanisms of the machine. Mounted upon the standard end of the main shaft 5 is a combined hand wheel and belt pulley 6 having a belt groove 7 that receives a driving belt 8.

The belt 8 is also entrained about a pulley 9 on the drive shaft 10 of a skeleton-type electric motor 11 arranged on a horizontal axis parallel to the axis of the main shaft 5 and disposed within the hollow standard 2. The drive shaft 10 is journaled in bearing brackets 12 and 13 which are secured by rivets 14 to the stator core 15 of the motor.

For mounting the motor within the standard 2 the bracket 13, which is preferably formed of sheet metal, is extended at its upper end to provide a horizontally arranged arm 16 having an aperture 17 that slidably receives a stud 18. The stud 18 is received within a bore 19 in a transverse bearing wall 20 in the upper portion of the standard 2 and is secured therein by a set screw 21. At its lower end the bracket 13 is extended to provide an arm 22 having a vertically elongated aperture 23 that receives a bushing 24 having a shank portion 25 extending through the aperture 23 and a head 26 having a diameter greater than the width of the aperture 23 and thus in engagement with the arm 22 around the aperture. A spacer sleeve 27 surrounds the shank 25 of the bushing 24 and abuts at its opposite ends against the arm 22 and a boss 28 in the bed 1. A screw 29 extends through the the bushing 24, sleeve 27, and stud 18. -It is also extreme-J 1y simple and inexpensive, to. assemble the motor into the bushing 24 and is threaded into the boss 28 to clamp the, opposite faces of the arm 22 between the head 26 of the bushing 24 and the end of the sleeve 27.

The stud 18, as well as the bushing 24 and sleeve 27, are formed of a non-conductive material, preferably molded nylon, to insulate the motor 11 from the standard 2 in which it is mounted. The stud 18'also holds an insulating shroud 30 about the motor 11.

There is thus provided means for effectively and secure-. ly mounting in the hollow standard 2 an electric motor and particularly 'a skeleton-type motor. Not. only is it electrically insulated from the standard, but it can be readily. adjusted radially relatively to the main shaft 5 to adjust the tightness of the belt 8. To adjust the motor, it is necessary to loosen the screw 25 and manually to move the motor to effect the desired adjustment, after which the screw 29 is again tightened. Themountingis also very inexpensive comprising only a slight modification in the sheet metal bearing bracket 13 to provide the arms 16 and 22, and a minimum of additional inexpensive parts in-- cluding the screw 29* and the molded nylon parts, that is,-

machine, merely requiring the motorbe inserted from the bottom with the stud 18 entering the aperture 17 in the arm 16, and then positioning the sleeve 27 and bushing" 24, and finally inserting the screw 29.

Numerous alterations of the structure herein disclosed will suggest themselves to those skilled in theart) How-.. ever, it is to be understood that the present disclosure re-v lates to a preferred embodiment of my invention which is for purposes of illustration only and not to be construed as a limitation of the invention. All such modifications which do not depart from the spirit of the invention are intended to be included within the scope of the appended claims.

Having thus described the nature of the invention, what I claim herein is:

1. In a sewing machine having a frame including a hollow standard and a bracket arm carried by said standard, a main shaft journaled longitudinally of said bracket arm, an electric motor having a drive shaft, pulleys mounted upon said drive shaft and said main shaft, a belt entrained about said pulleys for imparting rotation to said main shaft upon actuation of said motor, and means for mounting said motor within said standard with its drive shaft axis parallel to the axis of said main shaft for adjustment radially of the main shaft to adjust the tension of said belt, said means comprising a stud of electrically non-conductive material mounted in said frame upon an axis normal to the axis of said main shaft, a diametrically-arranged bracket on said motor and including an arm at one end having an aperture slidably receiving said stud forv adjustment of said bracket in a direction endwise of said stud, said bracket having a slot in the end opposite from said ear, a threaded fastening element extending through said slot and into said frame for adjustably securing said bracket to said frame, and an electrically nonconductive element disposed between said frame and fastening element and said bracket for insulating said bracket from said frame.

2. In a sewing machine having a frame including a I hollow standard and a bracket arm carried by said shaft, meanslconnecting one end of said stud to said first arm and the other end to said frame and including means for securing one end of said stud and an aperture for slidably receiving the other end of said stud to prevent motion of said first arm in adirection normal to the axis of said stud and to provide for motion ofsaid first 'a'rmin a direction endwise of said stud, a second arm secured to and extendingdownwardly from said motor to an accessible position at the lower end of said standard, and means for releasably securing said second arm to said frame.

3. In a sewing machine having a frame including a hollow standard and a bracket arrn carried by said standard, a main shaft journaled longitudinally of said bracket arm, an electric motor having a drive shaft, means for connecting said drive shaft to said main shaft for driving said main shaft upon actuation of said motor, and means for mountingsaid motor in said standard beneath said main shaft and upon an axis parallel to the axis of said main shaft comprising 'a first arm secured toand extending upwardly from said motor toward said main shaft, a stud formed of electrically non-conductive material'and arranged substantially normal to said main shaft, means connecting one end of said stud to said first arm and the other end tosaid frame and including means for securing oneend .of said stud andan aperturefor slidably receiving the other end of said stud to prevent'motion of said mounting said motor in said standard beneath said main shaft and upon an axis parallel to the axis of said main shaft comprising .a first arm secured to and extending upwardly from said motor toward said main shaft, a stud arranged substantially normal to said main shaft, means connecting one end of said stud to said first arm and the other end to said frame and including means for securing one end of said stud and an aperture for slidably receiving the other end of said stud to prevent motion of said first arm in a direction normal to the axis of said stud and to provide for motion of said first arm in a direction endwise of said stud, a second arm secured to and extending downwardly from said motor to an accessible position at the lower end of said standard, and means for releasably securing said second armtto said'frame and providing for V adjustment of said motor toward and away from said main first arm in a' direction normal to the axis of said stud and V to provide for mdtioniof said first arm in a direction endwise of said stud, a second arm sec'ured to and extending downwardly'from said motor to an accessible position at the lower end of said standard, means for releasably securing said second arm to said frame, and an electrically nonconductive element for insulating said second arm from said frame.

shaft comprising a slot formed insaid second arm and a fastening element threaded into said frame.

7 References Cited in the file of this patent i UNITED STATES PATENTS 1,308,456 Taylor- July 1, 1919 2,318,442 Way et al.' Q. May 4, 1943 2,617,375 Peets Nov. 11, 1952 2,863,413 Strocco Dec. 9, 1958 

